Autosuggestion is a very useful feature available in fish, zsh, and prompt-toolkit.

Ptpython allows users to enable this feature in ptpython/config.py.

This feature allows users to accept autosuggestions with ctrl e, ctrl f, or right arrow as described below.

1. Start ipython

2. Run print("hello")

3. Press p to see the autosuggestion

4. Press ctrl f, or ctrl e, or right arrow to accept the suggestion

You can also complete word by word:

1. Run def say_hello(): print("hello")

2. Press d to see the autosuggestion

3. Press alt f to accept to accept the first word of the suggestion

Importantly, this feature does not interfere with tab completion:

1. After running def say_hello(): print("hello"), press d

2. Press Tab to start tab completion

3A. Press Tab again to select the first option

3B. Press alt f to accept to accept the first word of the suggestion

3C. Press ctrl f or ctrl e to accept the entire suggestion

To install a version of ipython with autosuggestions enabled, run:

pip install git+https://github.com/mskar/ipython@auto_suggest

Currently, autosuggestions are only shown in the emacs or vi insert editing modes:

• The ctrl e, ctrl f, and alt f shortcuts work by default in emacs mode.
• To use these shortcuts in vi insert mode, you will have to create custom keybindings in your config.py.